Understanding Discrete Quantities in Electrical Charge

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SUMMARY

The discussion centers on the concept of electrical charge existing in discrete quantities, specifically as integral multiples of the elementary charge, which is quantified as 1.6022 x 10-19 C. Participants clarify that "discrete quantities" refer to values that can only be whole numbers, akin to counting sheep, where fractional values are not possible. The reason for this integral nature of charge remains speculative, with no empirical evidence of fractional charges, as established during Millikan's Oil Drop experiment, which provided foundational insights into the quantization of electric charge.

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  • Understanding of basic electrical concepts, specifically "elementary charge"
  • Familiarity with the significance of Millikan's Oil Drop experiment
  • Knowledge of fundamental physics terminology related to charge and quantization
  • Basic mathematical skills for interpreting scientific notation
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  • Research the implications of quantization in quantum mechanics
  • Study the methodology and findings of Millikan's Oil Drop experiment
  • Explore the concept of charge conservation in physics
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Students of physics, educators teaching electrical concepts, and researchers interested in the fundamental properties of charge and its quantization.

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Homework Statement



"The electrical charge exists in discrete quantities, which are integral multipuls of the electronic charge, 1.6022 e -19 C"

What does "discrete quantities" mean? and Why is electrical charge an integral multipul of the electronic charge instead of just a multipul of the electronic charge?
 
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"Discrete" means that it can only have certain values, not just any old value. For example, the number of sheep in a field is discrete quantity; you can only have 1 sheep, or 2 sheep, or 3 sheep, etc., but not some fractional number like 1.34995 sheep. Electric charge works the same way: you can only have 1 elementary charge (elementary charge = electron charge), or 2x the elementary charge, or 3x the elementary charge, etc., but not any fractional number.

As for why? Nobody really knows. There is some theoretical speculation of reasons why charge occurs only in integral multiples of the elementary charge, but nothing super-convincing. All we really have to go on is that nobody's ever seen a charge which wasn't an integral multiple of the elementary charge.
 
the discrete quantity means that if you go and measure the charges of several individual electrons, you won't get a range of charges.

The integral multiple one is mostly because you can't really have a fraction of an electron.

EDIT: these observations as far as I know was deduced during Milikan's Oil Drop experiment.
 

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